IREM Proton Counting Rates
Proton counting rates measured by IREM from switch on until mid-November. Note the logarithmic counting rates. The "spikes" occur during each perigee passage as Integral transits the radiation belts. The reduction in the proton flux by almost three orders of magnitude from the initial transfer orbit to the operational orbit is evident. The broad feature around 10 November is associated with solar activity - Courtesy: P. Buehler and the IREM team.